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Finding the Fourth Proportional to 8,611.68, 12,917.04 and 2,772.48

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Solution

The fourth proportional to 8,611.68, 12,917.04 and 2,772.48 is: 4,158.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.68 : 12,917.04 = 2,772.48 : x
  2. Step 2: Convert to fraction form
    8,611.68/12,917.04 = 2,772.48/x
  3. Step 3: Cross multiply
    8,611.68x = 12,917.04 × 2,772.48
  4. Step 4: Simplify right side
    8,611.68x = 35,812,235.06
  5. Step 5: Solve for x
    x = 35,812,235.06/8,611.68
  6. Step 6: Final answer
    x = 4,158.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.